$fn = 60;
// 3/16 inch in mm deck_depth = 4.7625;
-// 1/4 inch in mm - a little to be a squeeze fit
-deck_depth = 6.35 - 0.4;
+// 1/4 inch in mm = 6.35
+// subtract a little to be a squeeze fit
+deck_depth = 4.7625 - 0.4;
sonar_plate_width = 20;
// sonar sensor measurements taken with calipers:
// 10.82 in between, 42.33 outside, 15.82 diameter
// but when printed ends up being too small
sonar_sensor_radius = 15.82 / 2 + 0.3;
sonar_sensor_height = 13.8;
-between_sensor_centers = 15.82 + 10.82;
+between_sensor_centers = sonar_sensor_radius * 2 + 10.82;
+between_sensor_centers_variance = 2;
sonar_plate_length = 3 + between_sensor_centers + sonar_sensor_radius + 3;
sonar_holder_length = sonar_plate_length + 10;
sonar_holder_width = sonar_plate_width + 3;
sonar_holder_depth = 4;
deck_holder_length = 30;
-deck_holder_width = sonar_holder_width;
module sensors(){
translate([between_sensor_centers / 2, 0, 0]){
cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}
+ translate([between_sensor_centers / 2 - between_sensor_centers_variance,
+ 0,
+ 0]){
+ cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);
+ translate([0, -sonar_sensor_radius, 0]){
+ cube([between_sensor_centers_variance,
+ sonar_sensor_radius * 2,
+ sonar_sensor_height]);}}
translate([-between_sensor_centers / 2, 0, 0]){
cylinder(r = sonar_sensor_radius, h = sonar_sensor_height);}}
translate([sonar_holder_length / 2, sonar_holder_width / 2, -0.05]){
sensors();}}
translate([sonar_holder_length, 0, 0]){
- cube([sonar_holder_depth + 0.3, deck_depth - 0.3, deck_depth - 0.3]);
- translate([sonar_holder_depth + 0.3, 0, 0]){
+ cube([sonar_holder_depth + 0.7, deck_depth, deck_depth - 0.7]);
+ translate([sonar_holder_depth + 0.7, 0, 0]){
// subtract a little bit (0.3) to make it fit
- cube([deck_depth - 0.3, sonar_holder_width, deck_depth - 0.3]);}}}
+ cube([deck_depth - 0.7, sonar_holder_width, deck_depth - 0.7]);}}}
module deck_holder(){
- cube([deck_holder_length, sonar_holder_depth, sonar_holder_width]);
+ deck_holder_width = sonar_holder_width - deck_depth;
+ cube([deck_holder_length, sonar_holder_depth, deck_holder_width]);
cube([sonar_holder_depth,
sonar_holder_depth * 2 + deck_depth,
- sonar_holder_width]);
+ deck_holder_width]);
translate([0, sonar_holder_depth + deck_depth, 0]){
- cube([deck_holder_length, sonar_holder_depth, sonar_holder_width]);}
+ cube([deck_holder_length, sonar_holder_depth, deck_holder_width]);}
translate([sonar_holder_depth + deck_depth, 0, 0]){
cube([sonar_holder_depth,
sonar_holder_depth * 2 + deck_depth,
- sonar_holder_width]);}}
+ deck_holder_width]);}}
-module sonar_table_top_holder(){
- difference(){
- union(){
- cube([sonar_holder_length, sonar_holder_width, sonar_holder_depth]);
- translate([sonar_holder_length, 0, 0]){
- deck_holder();}}
- translate([between_sensor_centers / 2 + sonar_sensor_radius + 3,
- sonar_holder_width / 2,
- -1]){
- sensors();}
- // cut out a bit of the circle to make it 3d printable,
- // no severe overhang
- translate([3 + sonar_sensor_radius,
- sonar_holder_width - 3.025,
- sonar_holder_depth / 2 - 0.025]){
- cube([10, 6.1, sonar_holder_depth + .1], center = true);
- translate([between_sensor_centers, 0, 0]){
- cube([10, 6.1, sonar_holder_depth + .1], center = true);}}}}
-
-sensor_holder();
+translate([0, sonar_holder_depth * 2 + deck_depth + 2, 0]){
+ sensor_holder();}
+deck_holder();